Imagine you are placed in an unknown location in the middle of the ocean. You see the moon at its half.
Which are the different "sets of information" which, if provided to you, would allow you to tell correctly if the moon is waxing or waning?
As you might know, there are several different, independent methods to answer the above based on different space-time information. From my rudimentary/amateur knowledge of astronomy I have identified three. I am, however, curious of all the alternatives.
I am particularly interested in two scenarios:
- You cannot see the landscape of the surface of the moon (say, a thin layer of clouds cover it).
- You can see the landscape of the surface of the moon (i.e. you can see half of the "moon rabbit")